Compound insulated structure



Nov. 22, 1927.

L. L.. KNOX coMPoUND INSULATED STRUCTURE original Filed May i. 1924 5 Sheets-Sheet l INVENTOR ff @of Nov. 22, 1927.

L. L. KNOX COMPOUND INSULATED STRUCTURE Origin ,Fil May 1. 1924 3 Sheets-Sheet 2 INVENToR iM/( QM YQ/M. 852144., #fa

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Nov. 22, 1927. 1,650,279

L. L. KNOX COMPOUND INSULATED STRUCTURE Original Filed May l. 1924 5 Sheets-Sheet 5 u. u, L.-MA1- INVENTOR ww am WML, al ab@ difficulty and to greatly kample,

Patented Nov. 22, 1927.

UNITED STATES 1,650,279 PATENT oFFIcE.

LUTHER L. KNOX, 0F BELLEVUE, PENNSYLVANIA, ASSIGNOR T0 KNOX PRODUCTS COMPANY, PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

COMPOUN D INSULATED STRUCTURE. i

Application i1ed May 1, 1924, Serial No. 710,357. Renewed April 22, 1927.

In the drawings:

Figure l is a front elevation of a refrigerator containing my invention;

Figure 2 is a vertical cross section of the same; Figure 3 isa horizontal section, looking downward, on the line III--III of Figure l;

Figure 4 is a plan view, partly in section,-

of an iceboX or ice cream cabinet embodying my invention; j

Figures 5 and 6 are, respectively, longitudinal and transverse sections of the form shown in Figure 4;

Figure 7 is a cross sectional view similar Y to Figure 3 showing a modification, and

boxes, ice cream cabinets, etc. In the usual construction of such walls, a jacket space is rovided therein which has ordinarily .been filled by inserting blocks or pieces of insulating material, or is filled with granular material, such as granulated cork, mineral wool, etc. In such structu'resthe inner and outer walls of the jacket space were substantially independent of eachother structurally. Where this jacket space was filled with blocks of insulating material, voids were left around the blocks and between them and the jacket walls which allowed some air circulation. In the case of granular material, the material shifted and would settle, leavin spaces for air circulation.

' y invention is designed to overcome this enhance the yheat insulating value of such walls, and in the preferred form' to also make the walls substantially waterproof and acid-proof.

In carrying out my invention, I preferably insert in the jacket spaces blocks or slabs of insulating material, such, for eX- as molded cork, and then I fill the spaces between the molded cork and the walls of the jacketspaces with a material which preferablyJ remains of a semi-solid character, and which is also preferably waterproof and acid-proof. This material is v preferably heated to liquefy, or partially liqluefy it, and t ab y poured in "e material is then preferfll all the spaces around the blocks and between them and-the'jacket Walls.

In or'der to insure adherence between the plastic cement and the4 jacket walls, I preferably coat these walls prior to pouring in the plastic cement.

As an example of preferred materials to be used in accordance withvmy invention, I have coated the inner surfaces of the jacket wallswith a solution of coal tar oils. Such material is on the market and is a solution of oils extracted from coal tar in treating it. This coat-ing is applied cold and should bel allowed to dry for about four hours before inserting the insulating blocks. `This coating is preferably done before the metal sheets forming the walls are assembled and secured in place. y

After the walls are formed andthe insulating blocks inserted, I preferably heat a bituminous, asphalt or pitch-like material,

f fill the voids hbetween the insulating blocks or slabs and the walls of the jacket space. When such material cools to ordinary temperatures, it remains in a semi-solid condition for an indefinite period. When cold it remains in a semi-solid condition for an indefinite period.

In the drawings Figures 1, 2 and 3 show a refrigerator made in accordance with my invention. In this case 2 represents t-he side walls, 3 the back wall, 4 the doors and -5 the bottom sheet lof the Ibottom wall of the refrigerator. These Walls areshown `as made up of metal sheets assembled together and secured in any desirable manner, as by seaming, the doors being formed in a similar manner. T he jacket space between the walls is shown as filled with ribbed slabs of molded cork 6 the ribs in any one portion of the space preferably extending in the same direction longitudinally of. the blocks. These ribs will properly space the blocks and center them between the jacket side walls, leaving side spaces for the plastic cement.y The ribs in the back and side walls are. shown as extending vertically, and in Figure 8 I show the assembled refrigerator turned upside down with its bottom end upward and left open previous to inserting the insulating-blocks in the bottom jacket portion and securing the bottom plate 5 in place. While in this condition the heated and liqueed cement is poured in through the bottom of the refrigerator and ilows down along the cork ribs of the blocks in the side and back walls, and also along the ribs in the top, which is now at the bottom. When the voids are entirely filled up to the inner level of the bottom, the cork blocks are inserted in the bottom jacket space and more cement 1s applied to completely surround the blocks in this bottom jacket space. The bottom plate 5 is then applied and secured in place.

The doors, of course, may be made 1n a similar manner, the plastic cement being poured or filled in around t-he block and the cover plate applied and seamed or otherwise secured in place.

In Figures 4, 5 and 6 I show an icebox made in the same general way, the cork slabs having the project-ing ribs as in the firsty t form. In this case the device is madein the form of a box 7 with removable covers 8 at the top. This is the ordinary form of f ice cream cabinet.

In Figure 7 I show a cross section of a refrigerator similar tot-hat of Figures l, 2 and 3, except that instead of forming the cork blocks or slabs with ribsl thereon, I employ Wires or rods 9 to space the plain faced insulating blocks from the inner walls of the jacket space.` These wires or rods may be simply loose and laid in placeabefore the cement is filled in, or they may extend around the blocks and secured to each other or to others of the wires. Their sole kfunction is to center the blocks and to provide the side spaces to be filled with the cement.

The claims of this application are limited either to the feature of preliminarily coating the metal walls or of utilizing ribbed insulatingblocks or slabs, the broad subject matter of the application with respect to compound Wallstructnres being made the subject matter of my copending application iSerial No. 2872, filed January 16, 1925.

The advantages of my invention will be .apparent to those skilled in the art, since the free spaces or voids heretofore present in these heat insulating walls are done away with, and their heat insulating value thusI increased. The opportunity for voids through which air can circulate is prevented and the construction is improved. Lighter sheet material may be used for the wall structure, and in the preferred form the device is made far more waterproof and acidproof than ordinary walls.

Variousmaterials may be used for the heat 'insulating filler blocks or slabs, as well as for the cement employed. The cement may be oured in or otherwise applied. It is pre erably of a nature to soften by heat, though it may be of a character to set and harden .-by drying or otherwise. The heat insulating material may be at one side of the jacket space with the cement between it and the other wall. The preliminary coating of the inner surfaces of the jacket walls may be used or not as desired, and other changes may be made without departing from my invention.

I claim:

l. A compound coated wall structure having a jackety space, a.solid fillerin the jacket space, and semi-solid materialbetween the filler and a coated wall of the jacket, said material being semi-solid at normal temperatures and liquefying under heat.

2. A heat insulating wall having a jacket space, a preformed ribbed heat insulating block or slab in the space, and cement iilling between the said block and 'awall of the jacket space.

3. A heat insulating wall -having a j acketV 4filler and the coated walls.

6. A compound wall structure including vspaced apart wall members having an interlor coating thereon, a. mass of filler in `the space between the wall members and held in sp-aced relation thereto, and a cement yaround the mass of filler and filling the spaces between the filler. and the coated wall members.

7. A compound wall structure including spaced apart wall members having an interior coating thereon, a mass of filler in the space between the coated wall members and held in spaced relation thereto, and a plastic bituminous compound around the mass of filler and filling the spaces between the filler and the coated wall members.

8. A compound wall structure having a wallmember, an adherent coating on the wall `member, a filler slab spaced from the coated side of the wall member, and a bituminous mass adheringto the coated surface of the wall member and interposed between the coated surface of the wall member and the filler slab.

In testimony whereofl I have hereunto set my hand.

y LUTHER L. KNOX. 

